Mammary Tumors in Dogs

breast cancer on dogs Mammary Tumors in Dogs
Breast Cancer

Among all cancers in women, he takes consumers. In most cases, cancer of the breast develops inside presence of precancerous changes. This is primarily a benign mammary dysplasia and papilloma ducts.

Breast cancer is represented macroscopically nodular and diffuse forms, as well as cancer of the nipple as well as the nipple in the field (Paget's disease with the breast). For the nodular cancers are seen as the node having a diameter all the way to several centimeters. In certain cases, a tight knot, is permeated with whitish layers tissue penetrating in to the surrounding fat, on other occasions - a soft, juicy for the cut, splits easily. Diffuse cancer of prostate is included for any considerable distance, the contours in the tumor are marked bad. Sometimes the cancer invades your skin layer and forms around the surface of decaying mushroom formation - a cancerous ulcer. In certain cases, the tumor spreads along the surface with the breast and the iron is covered using a dense shell.

In histological structure would be the following types of cancer of the breast:

• noninvasive: intralobular and intraduct;

• infiltrative.

Noninvasive cancer of the breast could be intralobular (lobular carcinoma in situ), and intraduct (ductal carcinoma in situ).

Infiltrating (invasive) cancer is seen as varying examples of tissue and cell irregularities, which permitted to distinguish different a higher level malignancy. This type of cancer include, specifically, infiltrating ductal and lobular carcinoma, which will gets the structure of scirrhus, and also Paget's disease.

Causes of Breast Cancer.

The causes of cancer of the breast often are hormonal changes in the body: the entry into menopause, if you find a dynamic restructuring from the hormonal regulation from the woman, the ovaries lose their activity, decreased production of progesterone and estrogen, the body goes through, "hormonal crisis." The mammary gland and endometrium (lining with the uterus) are most tuned in to these changes, the breast tissue starts to dissolve and be replaced by fat.

Scientifically established that the female hormones estrogen-, plays a key role within the growth and development of breast cancers. The excess hormones inside body results in a favorable background for developing the condition. The least active hormones estrogen behave while pregnant and after birth - during breastfeeding. It is proved the birth and prolonged breastfeeding (over 1 year) to reduce the risk of developing cancer of the breast. On the other hand, abortion result in hormonal "explosion" inside a woman's body that could trigger the progression of tumors. So far there's no consensus about the impact around the progression of tumors of hormonal contraceptive drugs, but it's thought that these drugs reduce the risk of developing breast cancer, but increase the potential risk of developing cancer of the female genital organs, and osteoporosis. In addition predisposition to cancer of the breast might cause harmful environmental factors: the environment, in addition to inflammatory diseases previously deferred breast - mastitis.

In addition, patients having a category of first-degree relatives with cancer of the breast (mothers and sisters) likelihood of developing a tumor increasing by more than half - familial varieties of cancer.

Benign breast diseases for example fibrocystic breast disease, or fibroadenoz intraduct papillomatosis alone do not result in cancer, but at the same time, create an unfavorable background due to the development.

The reason for breast cancer would be the outcomes of radiation, including irradiation of the chest for other diseases (lung tumors, the lymphatic system), prolonged and frequent chest X-ray studies on inflammatory diseases or pulmonary tuberculosis.

Constitutional obesity can lead to cancer with the breast and female the reproductive system, with the excess fat inside body, it will become an outside endocrine organ and begins to actively produce hormones-estrogens, whose action and provokes the progression of tumors.

Symptoms of Breast Cancer

There are a couple of forms in the growth of breast cancers:

- Nodular form, the most frequent, is characterized by a dense knot of 0.5 to cm or higher, it's seen as an all from the following symptoms;

- Diffuse. All of them are very aggressive, grow quickly, almost lightning speed, the tumor without clear boundaries, "spreading" of the breast and skin. For the initial two forms are characteristic signs of inflammation: pain with the breast, a bright red color from the skin it raises body's temperature to 39 degrees C. In view of those symptoms often occur, and errors in diagnosis of patients treated for inflammatory diseases, which can be named and they are referred to these forms breast cancer. When tubular carcinoma cancer of the breast cover as being a "skin" of its contracting and decreasing in dimensions.

In certain cases, breast cancers manifests in the form of metastases inside lymph nodes for the affected side, often doesn't detect the tumor itself - show hidden cancer of the breast.

For small tumors with the breast, any symptoms arise. The most observant females and their husbands can easily detect tumor site within the gland by accident, but inside a large breast to detect small size hard knot. Revealed a knot could be painful when pressed, round, smooth and agile, this speaks and only a benign tumor. Signs of malignancy other: a decent knot to touch the stone, its surface is uneven, it can be stationary or slightly shifted, may be firmly fixed to the surrounding tissue or skin, usually painless, can reach a significant size (over 3 - 5 cm and often 10-15 cm).

Need to assess the surface in the skin in the tumor: the malignant process will be observed retraction from the skin, picking up within the folds, wrinkles, an indicator of "lemon peel" - a neighborhood swelling of the skin over the tumor, may be a direct tumor invasion to skin surface, then it might be a bright beautiful red colors and sprawl as "cauliflower."

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